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(No Model.)

s. A. eoss.

EXPANSION RUBBER BUCKET FOR GHAIN PUMPS. I No. 347,342. Pa tented Aug.17, 1886.

Mills I 22226 ?027' 1 0M1 0M.

' g Improvements in Expansion Rubber Buckets UNIT D STATES PATENTOFFICE.

SANFORD A. GOSS, OF CHICAGO, ILLINOIS, ASSIGNOR TO THE GOSS PUMP ANDRUBBER BUCKET MANUFACTURING COMPANY, OF SAME PLACE.

EXPANSION RUBBER BUC 5PECIFICAT3ON forming part of Letters Patent No.347,342, dated August 17, 1886.

Application filed October 13, 1885.

To all whom it may concern.-

Be it known that I, SANFORD A. GOSS, of Chicago, county of Cook, andState of Illinois, have invented certain new and useful for Chain-Pumps,of which the following is a full, clear, and exact description, thatwill enable others to make and use the same, reference being had to theaccompanying drawings, forming a part of this specification.

This invention relates to an improvementin that class of pump-bucketssetforth in Lett-ers Patent No. 305,071, granted to me September16,1884. The means, for attaching the bucket and link in the presentdevice being the same as that shown in said patent, illustration of saidattachingmeans in this case is unnecessary.

Figure 1 is a side elevation ofa pumpbucket embodyingmyimprovedfeatures; Fig. 2, a vertical section of the bucket proper; and Fig. 3shows the bucket doubled back, so as to permit of'the expansionnut beingadjusted with facility.

Referring to the drawings, A represents a bell'shaped rubber bucketmounted on the screw-threaded link B. The exterior contour of thisbucket is about the same as set forth in the patent above referred to.

The improved features consist, principally, in reversed inclines of theinterior of the bucket, so that the expansion-cavity has its largestdiameter above its lower end, with a gradual diminution in diameter bothupward- 5 ly and downwardly, or, gradually sloping inwardly from theangle or recess a, and in combining the bucket with ascrew-threadedlink, and an expansiounut adapted to expand the rubber, or presentnewwearing-surfaces,when

40 moved in either direction along the link.

Now, by placing the expansion-nut 0, having a threaded adjustment on thelink B, in the center of the recess a, the bucket may be expanded byturning the nut 0 either in an up- 5 ward or downward direction. Theexpansiom nut is set in recess a, and for the best wearing-nut fromworking off the link.

Serial No. 179,754. (No model.)

ing results it is first turned or adjusted in the upward direction untilit has gradually reached its limit and the upper part of the bucket hasbecome so much worn that it cannot be any longer expanded in thatdirection. The nut O is then returned to the recess or angle a, and soadjusted as to bring the bearing-surface of the same against the inwardincline of the thickened part a, and thereby ex- 5 5 pand the lower partof the bucket and change the exterior bearing or wearing-surface, thusnot only providing a bucket possessing increased expansive qualities,but also lengthens the life and durability of the same. The thicker parta likewise prevents the expand- The upper edge of the nut O is beveledto correspond to the inner circumferential surface of the bucket,thelower part being slightly beveled or rounded, so as not to present asharp bearing-edge to the bucket.

The bucket may be doubled back on the link in the manner illustrated inFig. 3, in which position it will remain fixed, thus allowing 7c. theexpanding-nut to be readily and conveniently adjusted to a new position,and when so adjusted the bucket is turned back upon the nut, as in Fig.2, and the rubber or bucket operates as a nut-lock to prevent changingthe adjustment, and a guardto prevent the reel or its forks from movingit.

The link B is provided with the dripgroove 1).

Having thus described my invention, what I claim, and desire to secureby Letters Pat ent, is-

The rubber bucket A, having its largest inward diameter at a thickenedat its lower end to form the inward incline, a, whereby it is adapted tobe expanded by moving an interior nut in either direction along thesupportinglink, substantially as described.

SANFORD A. GOSS. Vitnesses: 1

EDWARD O. WALKER, THOMAS B. BROWNE.

